Home / 20,691.51-31,040.18-6,646.83

Finding the Fourth Proportional to 20,691.51, 31,040.18 and 6,646.83

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Solution

The fourth proportional to 20,691.51, 31,040.18 and 6,646.83 is: 9,971.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.51 : 31,040.18 = 6,646.83 : x
  2. Step 2: Convert to fraction form
    20,691.51/31,040.18 = 6,646.83/x
  3. Step 3: Cross multiply
    20,691.51x = 31,040.18 × 6,646.83
  4. Step 4: Simplify right side
    20,691.51x = 206,318,738.65
  5. Step 5: Solve for x
    x = 206,318,738.65/20,691.51
  6. Step 6: Final answer
    x = 9,971.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.